Engine for coal-boring machines.



I. W. EVANS.

ENGINE EoR coAL BoRlNG MACHINES.

APPLICATION FILED DEC.5,EI9I4 Patented May 2, 1916.

2 SHEETS-SHEET I @VIII/1.00963 I. W. EVANS.

ENGINE FOR COAL BORING MACHINES.

APPLICATION FILED DEC. 5. 1914.

Izlnted May 2, H516.,

2 SHEETS-SHEET 2.

QW F11 ooe JAMES W. EVANS, or DENVER', coLeRaDo, 'assIGNoR BROTHERS, a man ooivirosien or mamas ENGINE FOR COAL-BORING'MACHINES..

i ,ieriae To all whom t may concern Be itknown that I, JAMES W. lvabzs, a citizen of the United States, residing in the cit-y and county of Denver and` State o'Colorado, have 'invented certain new and useful Improvements in Engines for CoalJBor` ing Machines; and I do declare the follow ing to be a full, clear, 'and exact'description of the invention,v such as will enable others skilled in the art to which it ap'pertai'ns tol make and use the Same, reference being had tothe accompanying drawings, and tothe characters ot' 'reference 'marked thereon'. which form apart of this specification.`

My invention relates to yimprovements in engines for coal-boring machines, my object being to provide a portable device of this character, which may be handled and operated by a single workman.

Having briefly outlined my improved construction, I will proceed to describe the same infdetail, reference being made to the accompanying drawing, in which is illustrated ai embodiment t'liereofl l Figure 1 'is a top vplairview` otmy-inrproved `machine'showing the ycasing partly in horizontal section, whereby the vcovervis removed and the interior rmechanism :dis-

closed. Fig. 2 is a side elevation ofthe maychine showing the same in use and'ona smaller sca'le. Fig. 3 is atop plan viewer' the same, shown on the same scal In Figs. 2 and 3, the coal bank 1s show i in section,

cutting the hole which the auger enters.

Fig. 4 is a section taken on the line 1-4. Fig. 1, lookingforwardly, or/in the direction of the arrow adjacent said line; the .parts being shown on a larger scale. Fig. 5 .is a horizontal section taken on the line Fig. l. llig. 6 is-a section taken through the endwise shit'table sleeve carried b v the crank shaft, looking forwardly. fthe said shaft being sho-wn in elevation.

The, same reference. characters indicate the saineparts in all the views.

Let thenuineral designate a casing having a cosed bottom (i, sidewalls T, a front wall 1 anda,rear wall 3, the latter being hollowed outI ybest illustrated in Figs. 1 and 3, to approximately,lit the body ot the user, wherebyy the, laitter is enabled `.tto press forwardly 'apoiithe machine. and :thus feed Specification of Letters Patent.

n 0E onE-trHIiaD-tro saivrsdit H. saMsoNfAND FRED H. SAMSON.

are located two partitions 1U, which Varel spacedsuhciently from the sidewalls T to make room t'or oscillatingcylinders S. the

pistons of which are connected. bv means l o t rods 9 withend cranks 1:2 ot a shai't 1 3 which is ]ournaled in bearings 1l formed integral lwith the partitions 10 of the` casing.;

.protrudes forwardly fron'i'the casing andv t0 its opposite extremity is attached-:an avugerg21." f I i i The motive fluid iterl actuating the' pis-I' tons of the cylinders 8 is delivered bya main' conduit 22, to a pipeQB', thelatter being sel curely 'mounted inthe casing" of 'the machine,' its opposite extremities communica` ting with Iiluid chests Qt'which are arranged' in operative Arelation with the cylinders 8/ to supply the latter vwith motive tluidffor actr` `uating the pistons (not shown) forl the' puiv pose of iin1i arting the rotarylmovement .to the-crankshaft 13 through the medium ot the lpiston rods 9 and thecranks 1Q.

' V-ithirthe portion 9,5 of the conduit f2.

` which, when properly 'ad stedwithiii* its allve fiialve casing, `said vpassage eoniniunicating lwith ithe conduit on opposite sides of the- Vcasing. -This lvalve is controlled from-a roiF casing 28, causes apassagi 13 ot the to register with apassage N `of 'the valve tary' bar 29 whose oppositeends aie jour-vr iialed in lboxes 'orbearings 30' andy 31,- vtormei'fl integral with the framel work of the casing. Connected with a crank 3Q fast. on this liar." lis a rod 33, whose extremity reinoteftroiu v, the bar is connected as shownat-Il. witha `crank yarm 35 fast on thefstem otthe' "valve Q6. By imparting v4a partial` rotaryl ymovement lto the` bar Q9. the 'operatori may actuate the/valvel'QG to cut otlithe-uiotive'fioo Huid'.Y -or turn it on as may -be desiredaf in order to supply the pistons ot' thecvlinders S with the necessary lubricant. l employ an oil cup which communicates b v a bottoni opening 3S,`w1th`a short conduit 39 avhich isy threaded into the valve casing 2Q assliown raieiirea May aviaire.' Application filed December 5, 1914. ,serial No. 875,587..

at 40j.-k i This casing is provided with yan opening 41 is'closed andthe -flow of oil to the passage 27 cut olf. Howevenas soon as the valve is shifted to'cut'o` the motive fluid or so that the passage 27 is out of register with the opening'43 of the valve. and the last named opening brought into -registerv with the opening 41. the valveopening 43 will be filled with oil. Hence, as soon as the valve ris adjusted to allow the .motive fluid to pass to the cylinders, a quantity of oil 'equal to that contained in the valve opening'43 is brought' into alinement withf-the passage through -the conduit, and

..'1s'"?con's'equently carried by the motive Huid into lthe cylinders.- A

l' "Wh'en drilling coal, it very frequently becomes necessary, owing to the sticking of the augerin the bank of coal, tol reverse the movement of the auger and for this reason,

provision is made for readily reversing the A'movement ofthe operating shaft 18. For

v instance, when the left hand pinion 16 is in may bel assumed that the auger is operating mesh with the relativelylarge gear 17 ,it

inthe direction totravel into the coal. Now, if it becomes necessary to reverse this movement, the sleeve 15. mustbe shifted on the crank shaft 13, to bring the right hand vpinion 16 into mesh-with the larger gear 17.

This is accomplished by imparting a partial rotary movement to a handbar 44, which is connected by means of a link 45, with an endwise movable shaft 46, which is slidable in openings formed in the partitions 10.

I' Secured to the shaft 46' is a bracket 47, whose forward extremity is made fast to a flat ring 48, loose on the sleeve 15, but located between two shoulders 49 and 50 which abut against the opposite ends of the ring.

the framework of the machine.

VThe bar 44 is journaled at its opposite ends in bearings 7 0 and 71, which are carried by y From this, it'A will be understood that when the operator wishes to shift thesleeve 15 on the crank shaft'to inipartthe reverse movement to the operating shaft 18, it will onlyv be necessary" to impart a partial rotation to the bar 44 in the proper direction. to shift the lefthand pinion 1G out of engagement with the gear 17, and bring the right-hand pinion into engagement with the said gear, or vice versa, as may berequired.

lAttention is called to' the fact that the cylinders 8 are of the usual oscillatory character, and that, by virture of this oscillation,

-..the fluid for operating 4the pistons is admitted to the cylinders at properly tervals, each of the 'cylinders being to turn on a single trunnion 5:2. its fiat side 53 being held in operative engagement with the side of the partition l0 adjacent the fluid chest 24, by means of a spiral spring 73,

one extremity of which bears against the chest 2.4 while the other extremity engages Aa stop nut 54 fast on the inner extremity of the trunnion.

' In order to lock the rota-ry bar 44 in the `desired position of adjustment after shifting the sleeve 15 for the purpose of bringing either pinion 16-into operative engagementV with the large gear 17, I employ a spring-actuated pin 55 which is slidable in lugs 56 and 57, formed on the bar, a helical spring 58 being located between the lug 57 and the stop 59 on the pin.` The forward extremity of this pin is adapted to enter recesses 60 formed in theadjacent stationary bearing 70. lVhen it is desired to unlock the bar 44 for purposes of rotating vthe same in. its end bearings, the pin 55 is moved rearwardly against its spring 58 far enough to diseiigage its forward extremity from the corresponding recess 60. As Soon as the bar is adjusted, the pin 55 will bel brought into register with another 'recess which the pin will enter assoon as released.

To aid the operator in supporting the inachine, a strap 61 is employed, the extremities of this strap are connected with leather loops 62, which are applied to the front wall 4 of the casing. This strap passes over the shoulders of the operator. During operation, the machine is supported by the user by means of this strap and the rotary handbars 29 and 44 which are grasped by the operator, and are rotated at will for the pur' pose of lubrication' and turning the motive Huid on or oif, or for the purpose of reversing the motion of the auger, as may be required.

Assuming that the operator has the machine in position for work, he places the auger against the bank-of coal, presses his body against the rear wall 3 of the casing, and turns on the motive fluidby imparting a partial rotary movement to the bar 29.

In 'this event. the auger begins to rotate,

and during this operation, the user feeds the auger into the coal by pressing lwith his body upon the rear wall of the casing. If the auger should become stuck, or if for any reason it`should become necessary to reverse its travel, a partial rotary movement will be imparted to the bar 44, as heretofore explained.

Attention.' is called to the fact that When-"1;V the machine is not in use, the auger may bei" detached and 'theeapparatus swung'around,

on.the body of the operator in snc'lia g manix ner that it is supported by the,strapflhithe.- body ofthe machine being brought'-into po sition under one arm with the: front holfi.'`

d plowed-out Wall 3 uppermost, Wherehyghthe machine will fit under the arm of the user and may be leasily transported from place to place.

Having thus described my' invention. what I claim is,-

1. A portable boring machine, comprising a casing, operating mechanism inclosed thereby, means connected with said casing for supporting the machine upon the body of the operator, and exteriorly located hand bars journaled in the casing and connected in operative relation with the mechanism within the casing, for controlling the same.

2. A portable boring machine comprising a casing, operating mechanism located therein,` a tool with which said mechanism isop` eratively connected, an exteriorly located hand bar journaled in the casing, and an operative connection between said hand bar andthe mechanism within the casing, for controlling the same.

3. A portable boring machine comprising a casing, a crank shaft journaled therein, an operating shaft carrying a tool, a gearing connection between the two shafts including a member shiftable on the crank shaft for reversing the rotation of the operating shaft, a hand bar journaled in the casing and an operative connection between said hand bar and the reversing member, substantially as described.

4. A portable boring machine comprising a casing, a tool shaft journaled therein, operating mechanism also carried by the casing and connected in operative relation with said shaft, means connected with the forward extremity of the machine to aid in sup porting the same upon the body of the operator, the rear portion of the casing being hollowed out to approximately fit the body of the operator, and hand bars exposed on opposite sides of the casing and connected in operative relation with the operating mechanism for controlling the same, substantially as described. In testimony whereof I affix my signature in presence of two Witnesses.

JAMES W. EVANS. IVitnesses:

MAZE KIRBY, A. EBERT OBRIEN. 

